Liquid level measurement structure and apparatus, and air conditioner

Abstract

A liquid level measurement structure (5) and apparatus, and an air conditioner. The liquid level measurement structure (5) comprises: a mounting housing (1) and a measurement portion (2). The measurement portion (2) is arranged facing a liquid level to be measured; the side of the mounting housing (1) close to said liquid level is provided with a water guide portion (11); the measurement portion (2) is arranged on the water guide portion (11), and a measurement end of the measurement portion (2) protrudes from the water guide portion (11); and the water guide portion (11) is recessed toward the side thereof distant from said liquid level. By means of the technical solution, the technical problem in the prior art that residual water is prone to adhering to a bottom plate of a liquid level measurement structure can be solved.

Description

Liquid level detection structure, device and air conditioner

[0001] This application claims priority to the patent application filed on March 26, 2025, with China National Intellectual Property Administration, application number 202510368273X, entitled "Liquid Level Detection Structure, Device and Air Conditioner". Technical Field

[0002] This application relates to the field of liquid level detection structure technology, and more specifically, to a liquid level detection structure, device, and air conditioner. Background Technology

[0003] Currently, portable air conditioners produce a large amount of condensate during the cooling process. If the condensate overflows, it may affect the electronic control components, damaging the motherboard or battery. Therefore, it is necessary to measure the amount of condensate produced and, based on the measurement results, activate the water pump to remove the stored condensate, thus preventing continuous use and overflow and achieving the drain-free function of the portable air conditioner.

[0004] However, heat exchanger fouling leads to condensate fouling. This foul condensate can cause dirt to remain near the detection end of the liquid level detection structure used to detect the condensate level. In existing liquid level detection structures, the base plate is usually flat. When the liquid level drops, moisture remains in the dirt. This moisture adheres to the base plate of the liquid level detection structure along with the dirt and can easily come into contact with the detection end, leading to inaccurate detection. Summary of the Invention

[0005] The main objective of this application is to provide a liquid level detection structure, device, and air conditioner to solve the technical problem that residual water easily adheres to the bottom plate of the liquid level detection structure in the prior art.

[0006] To achieve the above objectives, according to one aspect of this application, a liquid level detection structure is provided, comprising:

[0007] The mounting housing and the detection unit are arranged with the detection unit facing the liquid surface to be tested. The mounting housing has a water guiding part on the side close to the liquid surface to be tested. The detection unit is located on the water guiding part, and the detection end of the detection unit protrudes from the water guiding part. The water guiding part is recessed in the direction of the water guiding part away from the liquid surface to be tested.

[0008] Furthermore, the water guiding part has an arc-shaped structure; or, the water guiding part has a bent structure.

[0009] Furthermore, the water guide section is an arc-shaped surface; wherein:

[0010] Along the arcuate extension direction of the arcuate surface, from the center to the edge, the radius of curvature of the arcuate surface gradually decreases; and / or,

[0011] Along the direction from the mounting housing to the liquid surface to be tested, the height of the arc-shaped surface is greater than or equal to 2 mm and less than or equal to 3.5 mm.

[0012] Furthermore, the detection section includes a first electrode and a second electrode, and the water guiding section includes a first water guiding section, a second water guiding section and a third water guiding section connected in sequence. The first electrode is inserted into the first water guiding section and the second electrode is inserted into the third water guiding section.

[0013] Wherein, the side of the first water-guiding part away from the second water-guiding part is located on the side of the second water-guiding part closer to the liquid surface to be detected; and / or,

[0014] The side of the third water guide section furthest from the second water guide section is located on the side of the second water guide section closest to the liquid surface to be tested.

[0015] Furthermore, the liquid level detection structure also includes:

[0016] A boss portion is provided on the water guiding portion and located on the side of the water guiding portion closest to the liquid surface to be detected. The outer edge of the boss portion protrudes from the water guiding portion. The detection portion is inserted into the boss portion, and the detection end protrudes from the boss portion; wherein:

[0017] The boss is made of insulating material; or,

[0018] The outer wall of the protrusion is covered with insulating material.

[0019] Furthermore, along the direction from the mounting housing to the liquid surface to be tested, the length of the boss portion is greater than or equal to 4 mm and less than or equal to 8 mm; and / or,

[0020] The protruding portion includes an interconnected water-conducting surface and a dripping surface. The dripping surface is positioned opposite to the liquid surface to be tested. The detection unit is inserted into the dripping surface. The outer edge of the dripping surface protrudes beyond the periphery of the detection unit. The water-conducting surface surrounds the detection unit; and / or,

[0021] The detection section includes at least two detection electrodes and at least two bosses, with each of the at least two detection electrodes and at least two bosses being arranged in a one-to-one correspondence.

[0022] According to another aspect of this application, a liquid level detection device is provided, comprising:

[0023] A liquid storage device, which has a liquid storage cavity;

[0024] The liquid level detection structure described above has its detection end located inside the liquid storage chamber.

[0025] Furthermore, the liquid level detection device also includes:

[0026] A flow-blocking structure is set inside the liquid storage chamber around the detection end; the flow-blocking structure has a flow-blocking channel, the inlet of the flow-blocking channel is connected to the liquid storage chamber, and the outlet of the flow-blocking channel is set towards the detection end, and the detection end is connected to the liquid in the liquid storage chamber through the flow-blocking channel;

[0027] The flow-blocking channel has at least two bends, and the sum of the bend angles of each bend is greater than or equal to 270 degrees.

[0028] Furthermore, the bending angle of each bending segment is greater than or equal to 90 degrees and less than 180 degrees; and / or,

[0029] There are at least three bends, and the at least three bends are connected sequentially; and / or,

[0030] The flow-blocking structure consists of multiple ribs, all of which are connected to the bottom of the liquid storage component. The outer edge of each rib protrudes from the bottom of the liquid storage component; the multiple ribs form a flow-blocking channel.

[0031] Furthermore, along the extending direction of the flow-blocking channel, the width of the flow-blocking channel is greater than or equal to 2 mm and less than or equal to 4 mm; and / or,

[0032] Along the height direction of the liquid storage cavity, the side of the flow-blocking structure away from the bottom of the liquid storage component protrudes from the side of the level detection structure away from the bottom of the liquid storage component; and / or,

[0033] The liquid level detection device also includes a flow-dispersing element, which is disposed in the flow-blocking channel and has multiple flow holes for allowing liquid to pass through.

[0034] Furthermore, there are at least two detection ends, and the at least two detection ends are spaced apart along the extension direction of the liquid level detection structure. Along the extension direction of the liquid level detection structure, the liquid level detection structure has a first side and a second side that are arranged opposite to each other.

[0035] The flow-blocking channel has at least two outlets, with one outlet facing the first side and the other outlet facing the second side.

[0036] Furthermore, the liquid level detection device has a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall connected in sequence; the first sidewall and the second sidewall are arranged opposite to each other, and the third sidewall and the fourth sidewall are arranged opposite to each other;

[0037] Among them, there are at least two liquid level detection structures, one of which is located on the first side wall and close to one of the third and fourth side walls, and the other is located on the second side wall and close to the other of the third and fourth side walls;

[0038] There are at least two flow barriers, and at least two liquid level detection structures are set up in a one-to-one correspondence.

[0039] According to another aspect of this application, an air conditioner is provided, comprising: the liquid level detection device provided above.

[0040] Furthermore, the bottom of the liquid storage component of the liquid level detection device is provided with a recessed groove that communicates with the liquid storage chamber of the liquid level detection device; the air conditioner also includes:

[0041] Condenser;

[0042] A water impeller is disposed at least partially opposite to the condenser. The water impeller is rotatably disposed on the recessed groove and avoids the groove wall to carry the liquid in the recessed groove away from the liquid storage chamber and throw it onto the surface of the condenser.

[0043] By applying the technical solution of this application, the water-guiding part is recessed towards the side away from the liquid surface to be detected, which guides the liquid to flow along the surface of the water-guiding part. This design helps to ensure that when the liquid level drops, the liquid remaining on the side of the mounting housing closest to the liquid surface to be detected can flow away quickly along the recessed water-guiding part, preventing liquid from remaining at the bottom of the mounting housing and dripping down to the detection end, which would cause the detection end to come into contact with residual liquid and result in erroneous detection results. It also allows the water adhering to suspended matter or sediment in the liquid to flow away quickly along the guide of the water-guiding part when such matter or sediment remains on it, improving the accuracy and anti-interference capability of the liquid level detection. Therefore, the technical solution of this application can solve the technical problem of residual water easily adhering to the bottom plate of the liquid level detection structure in the prior art. Attached Figure Description

[0044] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0045] Figure 1 shows a schematic diagram of the liquid level detection structure provided according to Embodiment 1 of this application;

[0046] Figure 2 shows a top view of the liquid level detection structure provided according to Embodiment 1 of this application;

[0047] Figure 3 shows a front view of the liquid level detection structure provided according to Embodiment 1 of this application;

[0048] Figure 4 shows a bottom view of the liquid level detection structure provided according to Embodiment 1 of this application;

[0049] Figure 5 shows a schematic diagram of the liquid level detection device provided according to Embodiment 2 of this application;

[0050] Figure 6 shows an enlarged schematic diagram of the structure at point A in Figure 5;

[0051] Figure 7 shows a partial top view of a flow-blocking channel of the liquid level detection device according to Embodiment 2 of this application;

[0052] Figure 8 shows a partial top view of another flow-blocking channel of the liquid level detection device provided according to Embodiment 2 of this application;

[0053] Figure 9 shows a partial structural schematic diagram of an air conditioner provided according to Embodiment 3 of this application;

[0054] Figure 10 shows a partial top view of an air conditioner provided according to Embodiment 3 of this application.

[0055] The above-mentioned figures include the following reference numerals: 1. Mounting housing; 11. Water guide section; 111. First water guide section; 112. Second water guide section; 113. Third water guide section; 12. Connecting lug; 13. Positioning hole; 14. Wiring section; 2. Detection section; 21. First electrode; 22. Second electrode; 3. Boss section; 31. Water inlet surface; 32. Water dripping surface; 33. First boss section; 34. Second boss section; 4. Liquid storage component; 41. First side wall; 42. Second side wall; 43. Third side wall; 44. Fourth side wall; 45. Recessed groove; 5. Liquid level detection structure; 51. First side; 52. Second side; 6. Flow isolation structure; 61. Flow isolation channel; 611. Liquid inlet; 612. Liquid outlet; 613. Bend section; 7. Condenser; 8. Water impeller; 9. Water pump motor; 10. Compressor; 101. Evaporator; 102. Bottom shell. Detailed Implementation

[0056] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] As shown in Figures 1 to 4, Embodiment 1 of this application provides a liquid level detection structure 5, which includes a mounting housing 1 and a detection part 2. The detection part 2 is disposed facing the liquid surface to be detected. The mounting housing 1 has a water guiding part 11 on the side close to the liquid surface to be detected. The detection part 2 is disposed on the water guiding part 11, and the detection end of the detection part 2 protrudes from the water guiding part 11. The water guiding part 11 is recessed in the direction away from the liquid surface to be detected.

[0058] The liquid level detection structure 5 provided in Embodiment 1 of this application has a water-guiding portion 11 recessed towards the side away from the liquid surface to be detected. This design guides the liquid to flow along the surface of the water-guiding portion 11. This design helps to ensure that when the liquid level drops, the liquid remaining on the side of the mounting housing 1 closest to the liquid surface to be detected can flow away quickly along the recessed water-guiding portion 11. This avoids liquid remaining at the bottom of the mounting housing 1 and dripping down to the detection end, which would cause the detection end to come into contact with residual liquid and result in incorrect detection results. It also allows the water adhering to the suspended matter or sediment in the liquid to flow away quickly along the guide of the water-guiding portion 11 when it remains on the water-guiding portion 11, improving the accuracy and anti-interference ability of the liquid level detection. Therefore, the liquid level detection structure 5 provided in this embodiment can solve the technical problem of residual water easily adhering to the bottom plate of the liquid level detection structure in the prior art.

[0059] Specifically, the water guiding section 11 has an arc-shaped structure. This arc-shaped structure effectively guides the liquid along its surface, especially when the liquid drops from a higher level. The arc shape utilizes gravity and the surface tension of the liquid to promote rapid flow, preventing liquid from stagnating near the detection section 2 and improving the accuracy and timeliness of level detection. Furthermore, the special geometry of the arc-shaped structure helps to flush away impurities and deposits in the liquid as the level drops, improving the self-cleaning capability of the detection structure, reducing the frequency of maintenance and cleaning, lowering operating costs, and improving long-term operational reliability.

[0060] In this embodiment, the water guiding part 11 is an arc-shaped surface; wherein, along the arc-shaped extension direction of the arc-shaped surface, the radius of curvature of the arc-shaped surface gradually decreases from the middle to the edge. This gradually changing radius of curvature design allows the arc-shaped surface to have strong tension, thereby promoting the rapid sliding of residual liquid and avoiding false detections between electrodes due to residual liquid, thus improving the accuracy and timeliness of liquid level detection. Furthermore, this design also helps to mitigate the impact of equipment tilt or liquid fluctuations on the accuracy of electrode detection.

[0061] In this embodiment, the water guiding part 11 is an arc-shaped surface; wherein, along the direction from the mounting housing 1 to the liquid surface to be detected, the height of the arc-shaped surface is greater than or equal to 2mm and less than or equal to 3.5mm. This suitable height helps the liquid flow quickly through the area where the detection part 2 is located, avoiding liquid residue, thereby enhancing the structure's self-cleaning ability, reducing maintenance costs, and improving equipment reliability. As shown in Figure 3, 2mm ≤ H ≤ 3.5mm. H is the height of the arc-shaped surface along the direction from the mounting housing 1 to the liquid surface to be detected.

[0062] Specifically, the length of the arc-shaped surface in the longitudinal direction of the mounting housing 1 is greater than or equal to 20 mm and less than or equal to 25 mm. This ensures that the liquid level detection covers a sufficiently wide range of liquid level changes without adding unnecessary cost or volume due to excessive length. Within this length range, the arc-shaped surface provides sufficient guidance. As shown in Figure 3, 20 mm ≤ L ≤ 25 mm. L is the length of the arc-shaped surface in the longitudinal direction of the mounting housing 1.

[0063] Specifically, the length of the arc-shaped surface along the longitudinal direction of the mounting housing 1 is 22.5 mm. The height of the arc-shaped surface along the direction from the mounting housing 1 to the liquid surface to be tested is 2.1 mm.

[0064] In another embodiment, the water guiding section 11 has a bent structure. This structure effectively guides the liquid along a predetermined path, promoting rapid liquid flow away and preventing liquid stagnation near the detection section 2, thus improving the accuracy and timeliness of liquid level detection. Furthermore, the bent surface of the structure allows impurities adhering to the water guiding section 11 to be more easily carried away by the water flow, reducing the possibility of impurity residue on the water guiding section 11 and enhancing the self-cleaning capability of the detection section 2.

[0065] Specifically, as shown in Figures 1 to 4, the detection end is located at the bottom of the liquid level detection structure 5. The detection end consists of two metal rods extending from the housing. The diameter of the metal rods is in the range of 0.8-1mm (inclusive), the length of the metal rods extending from the housing is in the range of 8-15mm (inclusive), and the center distance between the two metal rods is in the range of 8-15mm (inclusive). Positioning holes 13 and connecting ears 12 are provided on both sides of the liquid level detection structure 5. Both the positioning holes 13 and the connecting ears 12 are used to fix the liquid level detection structure 5 to the liquid storage container 4. The two electrodes face the bottom of the liquid storage container 4 to detect the liquid level height inside the liquid storage container 4. A wiring part 14 is provided at the top of the liquid level detection structure 5. The wiring part 14 is used to connect to the relevant detection circuit for liquid level detection to transmit detection signals.

[0066] Specifically, when the water level in the liquid storage device 4 rises, the two electrodes are submerged by water and become conductive. The detection circuit detects the corresponding signal and determines that the water level in the liquid storage device 4 has reached the alarm position.

[0067] Specifically, the detection unit 2 includes a first electrode 21 and a second electrode 22, and the water guiding unit 11 includes a first water guiding part 111, a second water guiding part 112, and a third water guiding part 113 connected in sequence. The first electrode 21 is inserted into the first water guiding part 111, and the second electrode 22 is inserted into the third water guiding part 113. The side of the first water guiding part 111 away from the second water guiding part 112 is located on the side of the second water guiding part 112 closest to the liquid surface to be detected. With this structural arrangement, the configuration of the two electrodes and the water guiding part 11, especially the shape design of the water guiding part 11, can guide the liquid to flow along a specific path. Especially when the liquid level drops, it helps the liquid to quickly flow away from the electrode area along the surface of the water guiding part 11, preventing false communication between the two electrodes due to residual liquid, further improving the accuracy and reliability of liquid level detection. The shape design of the water guiding part 11 also helps to dry the electrodes quickly when they are not covered by liquid, reducing residual moisture on the electrode surface, avoiding electrode corrosion and increased maintenance costs, and extending the service life of the electrodes.

[0068] Specifically, the detection unit 2 includes a first electrode 21 and a second electrode 22, and the water guiding unit 11 includes a first water guiding part 111, a second water guiding part 112, and a third water guiding part 113 connected in sequence. The first electrode 21 is inserted into the first water guiding part 111, and the second electrode 22 is inserted into the third water guiding part 113. The side of the third water guiding part 113 furthest from the second water guiding part 112 is located on the side of the second water guiding part 112 closest to the liquid surface to be detected. This structural arrangement guides the liquid along a specific path, especially when the liquid level drops, facilitating rapid liquid flow away from the electrode area. This effectively prevents suspended matter or sediment in the liquid from bridging between the two electrodes, reducing false connections and improving the accuracy and anti-interference capability of liquid level detection. This design also helps the electrodes dry quickly when not covered by liquid, reducing residual moisture on the electrode surface, avoiding electrode corrosion and increased maintenance costs, and extending the electrode's lifespan. Furthermore, this design ensures the accuracy of liquid level detection in inclined or vertical directions, improving the overall performance of the equipment and the user experience.

[0069] In this embodiment, the liquid level detection structure 5 further includes a boss portion 3, which is disposed on the water guiding portion 11 and located on the side of the water guiding portion 11 closest to the liquid surface to be detected. The outer edge of the boss portion 3 protrudes from the water guiding portion 11. The detection portion 2 is inserted into the boss portion 3, and the detection end protrudes from the boss portion 3. The boss portion 3 is made of insulating material; or, the outer wall of the boss portion 3 is covered with insulating material. This structural arrangement utilizes the insulating properties of the boss portion 3 to form an effective insulating layer between the electrode and the mounting housing 1, avoiding direct contact between the electrode and the housing containing residual moisture, and reducing the risk of misalignment between electrodes. The structure of the boss portion 3 also ensures accurate electrode positioning; even under equipment vibration or tilting conditions, the electrode remains stable, improving the accuracy and stability of liquid level detection. In addition, the electrode protrudes from the boss portion 3, which ensures full contact between the electrode and the liquid. At the same time, when the liquid drops, the presence of the boss can accelerate the flow away of residual liquid, prevent liquid bridging between the electrodes, and further enhance the accuracy of liquid level detection and the self-cleaning capability of the equipment.

[0070] Specifically, along the direction from the mounting housing 1 to the liquid surface to be detected, the length of the boss portion 3 is greater than or equal to 4 mm and less than or equal to 8 mm. This structural design ensures that the boss portion 3 provides sufficient support and positioning for the electrode, without unnecessarily increasing material costs or structural complexity due to excessive length. Within the length range of 4 mm to 8 mm, the boss portion 3 effectively avoids the possibility of mis-contact between impurities in the liquid and the electrode. This length setting of the boss portion 3 also ensures stable contact of the electrode at different liquid levels, guaranteeing the accuracy and reliability of liquid level detection even during slight tilting or vibration during equipment operation.

[0071] Specifically, the boss portion 3 includes an interconnected water-guiding surface 31 and a dripping surface 32. The dripping surface 32 is positioned opposite to the liquid surface to be detected, and the detection unit 2 is inserted onto the dripping surface 32. The outer edge of the dripping surface 32 protrudes beyond the periphery of the detection unit 2, and the water-guiding surface 31 surrounds the detection unit 2. This structural arrangement optimizes the contact and separation process between the electrode and the liquid through the combination of the water-guiding surface 31 and the dripping surface 32. The water-guiding surface 31 surrounding the electrode prevents residual liquid from flowing onto the electrode surface, ensuring the immediacy of electrode conduction when the liquid level rises. The dripping surface 32, positioned opposite to the liquid surface to be detected and with its outer edge protruding beyond the periphery of the electrode, ensures that residual liquid can quickly slide off along the dripping surface 32 when the liquid level drops, preventing misleading conduction between the electrodes due to residual liquid and improving the accuracy and timeliness of liquid level detection. Furthermore, this design helps reduce liquid residue on the electrode surface, lowering maintenance costs and improving the long-term operational reliability of the equipment.

[0072] Specifically, the detection unit 2 includes at least two detection electrodes and at least two bosses 3, with each detection electrode and boss 3 arranged in a one-to-one correspondence. In this way, each detection electrode is equipped with a boss 3. The bosses 3 effectively prevent impurities and deposits from forming conductive paths between the electrodes, reducing the chance of false continuity due to impurity residue. False continuity is a common problem in level detection, especially in environments with poor water quality. The design of the bosses 3 reduces this risk and improves the long-term operational reliability and accuracy of the detection unit 2.

[0073] Specifically, the boss portion 3 includes a first boss portion 33 and a second boss portion 34. The first boss portion 33 corresponds to the first electrode 21, and the second boss portion 34 corresponds to the second electrode 22.

[0074] As shown in Figures 5 to 8, Embodiment 2 of this application provides a liquid level detection device. The liquid level detection device includes a liquid storage component 4 and a liquid level detection structure 5 provided in Embodiment 1. The liquid storage component 4 has a liquid storage cavity, and the detection end of the liquid level detection structure 5 is disposed in the liquid storage cavity.

[0075] The liquid level detection device provided in Embodiment 2 of this application has a water guide portion 11 recessed towards the side away from the liquid surface to be detected. This design guides the liquid to flow along the surface of the water guide portion 11. This design helps to ensure that when the liquid level drops, the liquid remaining on the side of the mounting housing 1 closest to the liquid surface to be detected can quickly flow away along the recessed water guide portion 11, preventing liquid residue from remaining at the bottom of the mounting housing 1 and dripping down to the detection end, which would cause the detection end to come into contact with residual liquid and result in incorrect detection results. It also allows the water adhering to the suspended matter or sediment in the liquid to quickly flow away along the guide of the water guide portion 11 when it remains on the water guide portion 11, improving the accuracy and anti-interference ability of the liquid level detection. Therefore, the liquid level detection device provided in this embodiment can solve the technical problem of residual water easily adhering to the bottom plate of the liquid level detection structure in the prior art.

[0076] It should be noted that portable air conditioners, also known as outdoor integrated portable air conditioners, are small, energy-efficient, and require no installation, allowing them to be placed anywhere. During the cooling process, the heat exchanger of a portable air conditioner produces a significant amount of condensate. Portable air conditioners feature a drain-free function; by periodically activating the water pump, the water is drained into a collection tray, preventing condensate overflow from continuous use.

[0077] Specifically, the liquid storage component 4 is the water receiving tray of the air conditioner.

[0078] Specifically, the level detection structure 5 is an electrode-type level switch, with the detection end being an electrode, which is a metal rod. In this case, the water receiving tray or tank of a portable air conditioner heat exchanger is typically quite thin (generally 15-25 mm), while conventional float-type level switches are large and have low accuracy. Capacitive and photoelectric level switches are significantly affected by water quality and tank panel conditions, and their structures are complex and costly. Electrode-type level switches are suitable for level detection in such confined spaces. Therefore, compared to other types of level switches, such as float-type, capacitive, or photoelectric level switches, the electrode-type level switch, combined with a flow-blocking structure, offers advantages in terms of cost and structural complexity, while achieving high-precision detection and reducing equipment usage and maintenance costs.

[0079] Specifically, the liquid level detection device also includes a flow-blocking structure 6, which is arranged around the detection end within the liquid storage chamber. The flow-blocking structure 6 has a flow-blocking channel 61, with its inlet 611 connected to the liquid storage chamber and its outlet 612 facing the detection end. The detection end is connected to the liquid in the liquid storage chamber through the flow-blocking channel 61. The flow-blocking channel 61 has at least two bends 613, with the sum of the bend angles of each bend 613 being greater than or equal to 270 degrees. With this structural arrangement, by providing a flow-blocking channel 61 with at least two bends 613 and a sum of bend angles greater than or equal to 270 degrees, the flowing water can bend multiple times through the flow-blocking channel 61. The fluctuations in the water flowing into the inlet 611 of the flow-blocking structure 6 will gradually weaken as the bends 613 guide the flow, thus making the fluctuations at the outlet 612 very weak, thereby reducing the impact of water fluctuations on the accuracy of liquid level detection. This avoids the direct impact of instantaneous water level changes caused by equipment vibration or water level fluctuations on the detection end, reducing false alarms for full water protection and improving system reliability. Even when the equipment is tilted or the ground is uneven, the detection end can accurately detect the liquid level height, thereby improving the environmental adaptability of the entire liquid level detection structure.

[0080] Specifically, the flow-blocking structure 6 can also be configured such that at least a portion of the outer wall of the liquid storage component 4 is connected to the flow-blocking structure 6, and the detection end is located between the flow-blocking structure 6 and at least a portion of the outer wall of the liquid storage component 4. The flow-blocking structure 6 and at least a portion of the outer wall of the liquid storage component 4 are arranged together around the detection end. With this structural arrangement, the outer wall of the liquid storage component 4 can be used to reduce the number of flow-blocking structures 6, thereby reducing costs and improving structural simplicity. The flow-blocking structure 6 and at least a portion of the outer wall of the liquid storage component 4 together form a relatively closed detection environment, thereby reducing the possibility of the detection end directly contacting the external environment and avoiding the situation where external fluctuations directly interfere with the liquid level detection without being buffered by the flow-blocking channel 61.

[0081] Specifically, the bending angle of each bend 613 is greater than or equal to 90 degrees and less than 180 degrees. This structural design ensures that the water flow path within the flow-blocking channel 61 has sufficient complexity, effectively reducing water flow fluctuations. At the same time, it avoids water flow stagnation or backflow that may be caused by sharp-angle bends, ensuring smooth water flow and thus further improving the accuracy and stability of the detection.

[0082] Specifically, as shown in Figures 7 and 8, the dotted lines in Figures 7 and 8 illustrate the flow of water within the flow-blocking channel 61. Angle α corresponds to the bending angle of the bend section 613, where 90° ≤ α < 180°.

[0083] Specifically, there are at least three bends 613, and these three bends 613 are connected sequentially. Increasing the number of bends 613 forces the water flow to pass through more bends before reaching the detection end. This not only significantly reduces the impact of water flow fluctuations but also avoids false detections caused by the detection end momentarily contacting the liquid when the equipment vibrates or tilts slightly. Through the interconnected design of multiple bends 613, the flow isolation structure 6 can more effectively filter and stabilize the liquid level signal, improving the accuracy and reliability of liquid level detection.

[0084] Specifically, the flow-blocking structure 6 consists of multiple ribs, each connected to the bottom of the liquid storage component 4, with the outer edge of each rib protruding beyond the bottom of the liquid storage component 4; these ribs form a flow-blocking channel 61. In this way, the ribs create a tortuous fluid path, forcing the liquid to pass through a series of complex turns before reaching the detection end. This structure increases the path length for the fluid to reach the detection end, effectively reducing the impact of water flow fluctuations and improving the accuracy and stability of liquid level detection.

[0085] Specifically, to enhance structural stability, multiple ribs are integrally formed with the liquid storage component 4.

[0086] Specifically, adjacent ribs are arranged in an alternating pattern, such that the included angle between two adjacent ribs is greater than or equal to 90 degrees and less than 180 degrees. This structural arrangement ensures that the fluid, when passing through the flow-blocking structure 6, undergoes multiple turns greater than 90 degrees, preventing direct impact on the detection end and reducing false detections caused by fluid fluctuations. Simultaneously, this arrangement ensures the continuity of the fluid path and the uniform distribution of the fluid, improving the reliability and accuracy of the detection.

[0087] In this embodiment, the rib in the flow-blocking structure 6 is trapezoidal in shape, with its base facing the bottom of the liquid storage cavity to increase the contact area with the liquid. Simultaneously, its top edge faces the side of the rib away from the bottom of the liquid storage cavity. The two sides of the trapezoid form the guide surfaces of the flow-blocking channel 61. This trapezoidal rib design, by increasing the base edge, facilitates stable fluid distribution, while the guide surfaces on the sides help guide the liquid along a specific path, reducing the impact of fluid fluctuations on the detection end and improving the stability of the liquid level detection.

[0088] In another embodiment, the cross-sectional shape of the rib is semi-circular, with the arc surface located on the side of the rib away from the bottom surface of the liquid storage cavity. The arc surface forms the guide surface of the flow-blocking channel 61 to reduce resistance to liquid flow. In this way, the arc surface of the semi-circular rib can smoothly guide the fluid flow, reduce the impact and eddy current phenomenon of the fluid when passing through the flow-blocking structure 6, reduce the impact of fluid fluctuations on liquid level detection, and improve the detection accuracy and reliability.

[0089] In another embodiment, the ribs in the flow-blocking structure are wavy. These wavy ribs form a continuous, meandering flow path within the liquid storage chamber, increasing the path length for water to reach the detection end and thus slowing the water flow. This helps filter fluid fluctuations, ensuring the accuracy of liquid level detection. Simultaneously, the wavy structure disperses the fluid, preventing excessive local pressure from affecting the detection.

[0090] In this embodiment, along the extending direction of the flow-blocking channel 61, the width of the flow-blocking channel 61 is greater than or equal to 2 mm and less than or equal to 4 mm. This structural design ensures that the flow-blocking channel 61 provides sufficient flow area to guarantee smooth liquid passage, while the smaller channel width effectively reduces water flow fluctuations, minimizing false level detections caused by these fluctuations. The width control also considers the fluid viscosity and flow velocity, avoiding situations where the channel is too narrow, resulting in excessive fluid resistance, or too wide, failing to effectively reduce fluctuations, thereby optimizing the detection effect.

[0091] Specifically, along the height of the liquid storage chamber, the side of the flow-blocking structure 6 away from the bottom of the liquid storage component 4 protrudes from the side of the level detection structure 5 away from the bottom of the liquid storage component 4. With this structural arrangement, the height of the flow-blocking structure 6 is higher than that of the level detection structure 5, further ensuring that water flow fluctuations do not directly overflow onto the level switch. This ensures effective protection of the detection end by the flow-blocking structure 6. Even when the liquid level in the storage chamber is high or the water flow fluctuations are large, the protruding flow-blocking structure 6 can perform preliminary filtration and stabilization of the water flow, further improving the accuracy and reliability of level detection and avoiding false detections or misoperations that may be caused by direct impact on the detection end.

[0092] Specifically, along the height of the liquid storage chamber, the height of the flow-blocking structure 6 is greater than or equal to 25mm and less than or equal to 40mm. This fits the size of the drip tray in a typical portable air conditioner, ensuring effective protection of the detection end by the flow-blocking structure 6. Even when the liquid level in the storage chamber is high or the water flow fluctuates significantly, the protruding flow-blocking structure 6 can perform preliminary filtration and stabilization of the water flow, further improving the accuracy and reliability of liquid level detection and avoiding false detections or misoperations that may be caused by direct impact on the detection end.

[0093] Specifically, the height of the flow-blocking structure 6 is 61mm.

[0094] In this embodiment, the liquid level detection device also includes a flow-dispersing element disposed within the flow-blocking channel 61. The flow-dispersing element has multiple flow holes for allowing liquid to pass through. Thus, the addition of the flow-dispersing element further disperses and reduces fluid fluctuations. The multiple flow holes ensure that the fluid forms a uniform flow when passing through the flow-dispersing element, reducing the impact of localized fluid fluctuations on liquid level detection and enhancing the stability and accuracy of the detection. The use of the flow-dispersing element is particularly effective in improving detection results when there are large fluctuations in water flow.

[0095] Specifically, the flow-disrupting component is a flexible component, which includes at least one of the following: sponge, gauze, or filter screen. This flexible component allows it to adapt to the dynamic changes in the liquid flow. Simultaneously, these materials possess certain adsorption and filtration properties, enabling them to adsorb impurities or air bubbles in the water, reducing their impact on the electrode-type level switch and preventing false triggering caused by impurities or air bubbles adhering to the electrodes, thus ensuring the accuracy of level detection. Furthermore, the flexible component can absorb some of the impact force of the water flow, further reducing water flow fluctuations and improving the stability of level detection.

[0096] Specifically, as shown in Figure 6, the dashed lines in Figure 6 indicate one possible location of water flow. There are at least two detection ends, spaced apart along the extension direction of the liquid level detection structure 5. Along the extension direction of the liquid level detection structure 5, the liquid level detection structure 5 has a first side 51 and a second side 52 arranged opposite to each other. There are at least two flow-blocking channels 61, with one outlet 612 facing the first side 51 and the other outlet 612 facing the second side 52. This structural arrangement, with the two outlets 612 positioned towards the side of the liquid level detection structure 5 rather than the center, better ensures the accuracy of liquid level detection. Furthermore, the number of outlets 612 avoids both excessive numbers increasing the impact of water level fluctuations on liquid level detection and insufficient numbers causing inaccurate liquid level detection due to liquid flowing only from one side of the liquid level detection structure 5.

[0097] Specifically, the liquid level detection device has a first sidewall 41, a second sidewall 42, a third sidewall 43, and a fourth sidewall 44 connected in sequence; the first sidewall 41 and the second sidewall 42 are arranged opposite to each other, and the third sidewall 43 and the fourth sidewall 44 are arranged opposite to each other. There are at least two liquid level detection structures 5, one of which is located on the first sidewall 41 and close to one of the third sidewall 43 and the fourth sidewall 44, and the other is located on the second sidewall 42 and close to the other of the third sidewall 43 and the fourth sidewall 44. There are at least two flow-blocking structures 6, and the at least two flow-blocking structures 6 and the at least two liquid level detection structures 5 are arranged in a one-to-one correspondence. With this structural arrangement, the liquid level detection device has a first sidewall 41, a second sidewall 42, a third sidewall 43, and a fourth sidewall 44. The liquid level detection structure 5 is positioned at the first sidewall 41 and the second sidewall 42. This layout design fully utilizes the internal space of the liquid level detection device, ensuring a wider liquid distribution area for the liquid level detection structure 5 within the storage chamber, thereby improving the comprehensiveness and accuracy of liquid level detection. Simultaneously, the proximity of the liquid level detection structure 5 to the third sidewall 43 and the fourth sidewall 44 provides a more stable and reliable liquid level detection signal when the equipment is tilted or the liquid distribution within the storage chamber is uneven, further enhancing the adaptability and reliability of the equipment. The one-to-one correspondence between multiple flow-blocking structures 6 and the liquid level detection structure 5 not only provides multi-point liquid level detection but also reduces liquid fluctuations at different detection points, ensuring that the liquid level detection signal at each detection point is stable and accurate. This design further improves the comprehensiveness and accuracy of liquid level detection, enhances the overall stability of the equipment's control system, and reduces the risk of misoperation due to inaccurate liquid level detection.

[0098] As shown in Figures 9 and 10, Embodiment 3 of this application provides an air conditioner, which includes the liquid level detection device provided in Embodiment 2.

[0099] The air conditioner provided in Embodiment 3 of this application has a water guide portion 11 recessed towards the side away from the liquid surface to be detected. This design guides the liquid to flow along the surface of the water guide portion 11. This design helps to ensure that when the liquid level drops, residual liquid on the side of the mounting housing 1 closest to the liquid surface to be detected can quickly flow away along the recessed water guide portion 11, preventing liquid residue from remaining at the bottom of the mounting housing 1 and dripping down to the detection end, which could cause the detection end to come into contact with residual liquid and result in incorrect detection results. It also allows water adhering to suspended matter or sediment in the liquid to quickly flow away along the guide portion 11 when such matter or sediment remains on it, improving the accuracy and anti-interference capability of liquid level detection. Therefore, the air conditioner provided in this embodiment can solve the technical problem of residual water easily adhering to the bottom plate of the liquid level detection structure in the prior art.

[0100] Specifically, the bottom of the liquid storage component 4 of the liquid level detection device is provided with a recessed groove 45 that communicates with the liquid storage chamber of the liquid level detection device; the air conditioner also includes a condenser 7 and a water pump 8. The water pump 8 is at least partially opposite to the condenser 7. The water pump 8 is rotatably mounted on the recessed groove 45 and avoids the groove wall of the recessed groove 45, so as to carry the liquid in the recessed groove 45 away from the liquid storage chamber and throw it onto the surface of the condenser 7. With this structural arrangement, the water pump 8 avoids the groove wall of the recessed groove 45, ensuring that the water pump 8 can effectively carry out condensate from the recessed groove 45 when rotating. At the same time, because the water pump 8 only acts on the liquid in the recessed groove 45, and the inner bottom wall of the recessed groove 45 is lower than the bottom of the liquid storage component 4, the drop difference between the water pump 8 and the bottom surface of the water receiving tray can be reduced, the amount of residual water can be reduced, and the water pumping efficiency can be improved. Meanwhile, the water jet 8 throws the condensate onto the surface of the condenser 7, and the high temperature on the surface of the condenser 7 accelerates the evaporation of the condensate, reducing the working time of the water jet motor 9, thereby saving energy, reducing equipment operating costs, reducing noise during equipment operation, and improving user experience.

[0101] Specifically, the air conditioner's refrigeration system consists of components such as a base shell 102, a drip tray (equivalent to a liquid receiver 4), a compressor 10, an evaporator 101, and a condenser 7. The air conditioner's drainage function comprises a liquid level detection structure and a water-pumping device. The water-pumping device consists of a water-pumping motor 9 and a water-pumping wheel 8. When the liquid level detection structure 5 detects a high condensate level, the water-pumping device activates, pumping water onto the high-temperature surface of the condenser 7 to dissipate, thus achieving a drain-free function. The drip tray is positioned above the base shell 102, catching the condensate from the evaporator 101 and allowing it to flow down to the bottom of the condenser 7. A liquid level switch (equivalent to the liquid level detection structure 5) is installed above the drip tray to detect the condensate level.

[0102] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0103] 1. By setting the two metal electrodes of the electrode-type liquid level switch on an arc-shaped concave structural surface, and setting the base of the two metal electrodes with a boss structure, it is possible to avoid the formation of misleading communication between the two electrodes by the dirt and condensate residue, which would lead to incorrect detection.

[0104] 2. By setting a group of raised ribs around the level switch, the connection between the water level in the receiving pan and the water level detected by the level switch needs to take a curved route. This ensures that the water level detected by the electrodes of the level switch and the water level in the receiving pan are interconnected, and reduces the impact of water level fluctuations caused by starting the water pump on the water level of the level switch.

[0105] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0106] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0107] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0108] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0109] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0110] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A liquid level detection structure, characterized in that, include: The mounting housing (1) and the detection part (2) are arranged facing the liquid surface to be tested; the mounting housing (1) has a water guiding part (11) on the side close to the liquid surface to be tested; the detection part (2) is disposed on the water guiding part (11), and the detection end of the detection part (2) protrudes from the water guiding part (11); the water guiding part (11) is recessed in the direction away from the liquid surface to be tested.

2. The liquid level detection structure according to claim 1, characterized in that, The water guiding part (11) has an arc-shaped structure; or the water guiding part (11) has a bent structure.

3. The liquid level detection structure according to claim 1, characterized in that, The water guiding part (11) is an arc-shaped surface; wherein: Along the arcuate extension direction of the arcuate surface, from the center to the edge, the radius of curvature of the arcuate surface gradually decreases; and / or, Along the direction from the mounting housing (1) to the liquid surface to be tested, the height of the arc-shaped surface is greater than or equal to 2 mm and less than or equal to 3.5 mm.

4. The liquid level detection structure according to claim 1, characterized in that, The detection unit (2) includes a first electrode (21) and a second electrode (22). The water guiding unit (11) includes a first water guiding unit (111), a second water guiding unit (112), and a third water guiding unit (113) connected in sequence. The first electrode (21) is inserted into the first water guiding unit (111), and the second electrode (22) is inserted into the third water guiding unit (113). Wherein, the side of the first water guiding part (111) away from the second water guiding part (112) is located on the side of the second water guiding part (112) closer to the liquid surface to be detected; and / or, The side of the third water guide (113) away from the second water guide (112) is located on the side of the second water guide (112) closer to the liquid surface to be detected.

5. The liquid level detection structure according to claim 1, characterized in that, The liquid level detection structure also includes: A boss (3) is provided on the water guiding part (11) and located on the side of the water guiding part (11) close to the liquid surface to be detected. The outer edge of the boss (3) protrudes from the water guiding part (11). The detection part (2) is inserted into the boss (3), and the detection end protrudes from the boss (3). The boss portion (3) is made of insulating material; or, The outer wall of the boss (3) is covered with insulating material.

6. The liquid level detection structure according to claim 5, characterized in that, Along the direction from the mounting housing (1) to the liquid surface to be detected, the length of the boss portion (3) is greater than or equal to 4 mm and less than or equal to 8 mm; and / or, The protruding part (3) includes a water-guiding surface (31) and a dripping surface (32) connected to each other. The dripping surface (32) is disposed opposite to the liquid surface to be detected. The detection part (2) is inserted into the dripping surface (32). The outer edge of the dripping surface (32) protrudes from the periphery of the detection part (2). The water-guiding surface (31) is disposed around the detection part (2); and / or, The detection unit (2) includes at least two detection electrodes, and the boss (3) includes at least two, with at least two detection electrodes and at least two bosses (3) arranged in a one-to-one correspondence.

7. A liquid level detection device, characterized in that, include: Liquid storage component (4), the liquid storage component (4) having a liquid storage cavity; The liquid level detection structure (5) according to any one of claims 1 to 6, wherein the detection end of the liquid level detection structure (5) is disposed in the liquid storage cavity.

8. The liquid level detection device according to claim 7, characterized in that, The liquid level detection device further includes: A flow-blocking structure (6) is disposed around the detection end in the liquid storage cavity; the flow-blocking structure (6) has a flow-blocking channel (61), the inlet (611) of the flow-blocking channel (61) is connected to the liquid storage cavity, the outlet (612) of the flow-blocking channel (61) is disposed facing the detection end, and the detection end is connected to the liquid in the liquid storage cavity through the flow-blocking channel (61); The flow-blocking channel (61) has at least two bends (613), and the sum of the bend angles of each bend (613) is greater than or equal to 270 degrees.

9. The liquid level detection device according to claim 8, characterized in that, The bending angle of each of the aforementioned bending segments (613) is greater than or equal to 90 degrees and less than 180 degrees; and / or, The bending segment (613) is at least three, and the at least three bending segments (613) are connected sequentially; and / or, The flow-blocking structure (6) is composed of multiple ribs, each of which is connected to the bottom of the liquid storage component (4), and the outer edge of each rib protrudes from the bottom of the liquid storage component (4); the multiple ribs form the flow-blocking channel (61).

10. The liquid level detection device according to claim 8, characterized in that, Along the extending direction of the flow-blocking channel (61), the width of the flow-blocking channel (61) is greater than or equal to 2 mm and less than or equal to 4 mm; and / or, Along the height direction of the liquid storage cavity, the side of the flow-blocking structure (6) away from the bottom of the liquid storage component (4) protrudes from the side of the liquid level detection structure (5) away from the bottom of the liquid storage component (4); and / or, The liquid level detection device also includes a flow-disrupting element, which is disposed in the flow-blocking channel (61) and has a plurality of flow holes for allowing liquid to pass through.

11. The liquid level detection device according to claim 8, characterized in that, The detection end is at least two, and the at least two detection ends are spaced apart along the extension direction of the liquid level detection structure (5). Along the extension direction of the liquid level detection structure (5), the liquid level detection structure (5) has a first side (51) and a second side (52) that are arranged opposite to each other. The flow-blocking channel (61) is at least two, and the outlet (612) of one of the flow-blocking channels (61) is arranged facing the first side (51), while the outlet (612) of the other is arranged facing the second side (52).

12. The liquid level detection device according to claim 8, characterized in that, The liquid level detection device has a first sidewall (41), a second sidewall (42), a third sidewall (43), and a fourth sidewall (44) connected in sequence; the first sidewall (41) and the second sidewall (42) are arranged opposite to each other, and the third sidewall (43) and the fourth sidewall (44) are arranged opposite to each other; Among them, there are at least two liquid level detection structures (5), one of the at least two liquid level detection structures (5) is located on the first side wall (41) and close to one of the third side wall (43) and the fourth side wall (44), and the other is located on the second side wall (42) and close to the other of the third side wall (43) and the fourth side wall (44); There are at least two flow-blocking structures (6), and at least two flow-blocking structures (6) and at least two liquid level detection structures (5) are arranged in a one-to-one correspondence.

13. An air conditioner, characterized in that, include: The liquid level detection device according to any one of claims 7 to 12.

14. The air conditioner according to claim 13, characterized in that, The bottom of the liquid storage component (4) of the liquid level detection device is provided with a recessed groove (45) that communicates with the liquid storage chamber of the liquid level detection device; the air conditioner also includes: Condenser (7); A water jet (8) is disposed opposite to at least a portion of the condenser (7). The water jet (8) is rotatably disposed on the recessed groove (45) and avoids the groove wall of the recessed groove (45) so as to carry the liquid in the recessed groove (45) away from the liquid storage chamber and throw it onto the surface of the condenser (7).

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